Overhead projector



FIG. 1 is a perspective view of the front and top of an overhead projector showing my new design;

FIG. 2 is perspective view of the top and rear thereof;

FIG. 3 is perspective view of the top and one side thereof;

FIG. 4 is a perspective view of the top and other side thereof; and,

FIG. 5 is a top plan view thereof.

The bottom of the overhead projector forms no part of the claimed design. 

The ornamental design for an overhead projector, as shown and described. 